Type-writing machine.



No. 843,085. I 'PATENTED, FEB. 5, 907.

rw. HEWITT. TYPE WRITING MACHINE.

' APPLICATION FILED APE-19.1906.

3 SHEETS-SHEET 1.

a W haw/aw I YPATBNTIEDY FEB. 5, 1907.

A. W. HEWITT. TYPE WRITING MACHINE.

APPLICATION FILED APR.19 1906. v

' a SHEETS-SHEET s.

UN TED STATES PATENT OFFICE.

ALLIN W. HEWITT, OF BOGOTA, NEW JERSEY, ASSIGNOR TO UNDERWOOD TYPEWRITER COMPANY, OF NEW YORK, N. Y.,

NEW JERSEY.

No. sashes.

TYPE-WRITING MACHINE.

Eatented Feb. 5, 1907.

To all'whom it maygconcern:

Be it known that I, ALLIN W. HEWITT, a citizen of the United States, residing in B0- gota, in the county of Bergen and State of N ew'Jersey, have invented certain new anduseful Improvements inType-VVriting Masilent during the rotation of the platen and intended to be connected with the platen at will, so as to limit the backward and forward rotation thereof.

One of the objects of my invention is to provide compact, simple,- eflicient, and

- easilyunderstood and operated means for connecting the stop-wheel at will to the platen.

- Another object is to render the rotation of the platen. easymand noiseless when being turnedbackwardly and forwardly for the insertion and feeding of fresh bills or sheets.

, In carrying out certain features .of my invention I contriveto release the platen from the control of its usual line-spacing wheel at the same. time that I connect the platen to thejst'op-wheel, both results being obtained bya single endwise movement of the fingeriece which originally rotates the platen.

referably the releasing of the platen is'ef fected by the first part and the-connection of the platen to the stop-wheel by the last part of the endwise movement of the fingerwheel, the mechanism being so constructed that when the finger-wheel is pressed in for a small part of the full stroke the platen is 'released from the line-space wheel without be ing connected'to the stop-wheel, where y the o-erator can make fine adjustments of the p atenindependently of either wheel forthe purpose of writing upon ruled paper, ,makin corrections, &c. v

' In t e preferred form of the invention-I the stop-wheel.

'atedto connect the provide a clutch between the linespace wheel and the platen and another clutch between the stop-wheel and the platen and mount the finger-wheel upon a central rod which asses within the platen and controls both 0 utohes. Each of the clutches preferably consists of a pair of oppositely-placed bars each having jaws to bite the flange upon the wheel, the action of the bar being analogous to that of a wrench, so that the clutches are highl eflicient. r

' In the form of the invention shown herein the stop-wheel is provided with a pair of relatively adjustable stops, and a yielding detent is mounted upon the platen-frame to engage the stops, each of the latter having a tooth inclined so that the detent may'ride thereover, and each stop also having an abrupt tooth, which byabutting against the detent definitely arrests the rotation of the platen, so that the latter can play only with-. in certain limits when under the control of a the stop-Wheel.

In the accompanying drawings, Figure 1 is a perspective view of a platen-frame and platen having the improvements applied thereto, the stop-wheel being shown out of use and the hand-wheel being seen in full lines innor nal position and in dotted lines in the position to which it is pressed in by the operator in order to disconnect the platen from the line-space Wheel and connect it to v Fig. 2 shows the clutch rnechanis n in midway'or idle position, whereby the platen is disconnected from both linespace wheel and stop-wheel in order .to efiect fine adjustments of the platen. Fig. 3 is a sectional viewltaken"longitudinally of the platen and. illustrating parts in normal positions with the platen clutched to the'linespace wheel. .F 2, but showing the clutch 'mechanisn1 operplaten to the stop-wheel. Fig. .5 is' a sectiona view'sirnilar to 3, but taken on a plane at'right angles to the plane of section of Fig. 3, sofas to illustrate more clearly the normal-silent clutch, which is used to connect the platen with the stops wheel. Fig.- 6 is an end view of the platen mechanism, showing the central clutch-r leasing rod in section and showing one of the adjustable stops engaged by its spring-detent. Figs. 7 and.8'arecross-sections takenv A CORPORATION OF ig. 4 is a view-siinilar to Fig.

too

at about the line X X of Fig. and showing at one end of the platen and concentrically any extent for fine lineiadjustments, &c.

two .pairs of clutch-bars in section. Fig. 7 shows the stop-wheel clutchjn operative position, as Fig. 4, while Fig. 8 shows both clutches out of use, as at Fig. 2. Fig. 9 shows the platen-head and the manner of supporting the central rod thereon, the parts being seen in normal position. Fig. 10 is an edge view, partly in section, and Fig. 11 is a side elevation, of the stop-wheel. Fig. 12 shows edge and face views of a cap used for retaining the line-space-wheel clutch against displacement. Fig. 13 is a side elevation of the platen-head seen at Fig. 9, showing the central rod in cross-section. Fig. 14 shows edge and side views of the line-space wheel. 2 Fig. 15 gives face and edge views of one of the line-space-wheel-clutch members. Fig. 16 gives similar views of one of the stopwheelclutch members. Fig. 17 is a face and edge view of an outer cap.

The cylindrical platen 1 is journaled in a platen-frame 2 and has a notched line-space wheel 3, controlled by a yielding detent 4 and actuated by a pawl 5 and lever 6 to rotate the platen line by line, said pawl and lever usually provided with means for effect ing a variable throw, so as to secure different line-spacing. The platen. may be rotated at any time in either direction by means of hand-wheels 7 and 8.

The line-space wheel 3, which is mounted therewith, has a thin flange 9, with which engage jaws 10 and 11 of each of a pair of opposite similar clutch-bars 12, which extend within the platen. Normally these bars are pressed. apart by means of rolls 13, carried upon a bracket 14, which is fixed upon a rod 15, extending axially or centrally of the platen. Each bar, with its jaws, constitutes a wrench, the jaws-fitting closely over the flange and biting the same powerfully when the bars are pressed. apart, Fig. 3, so that the bars and the line-space wheel must rotate together about the platen-axis. The bars fit closely within opposite radial recesses 16, formed in a metal head 17, which is fixed to the platen by screws 18, passing through holes 19 in said head. The clutchbars hence rotate always with the'platen and serve to lock the latter to the line-space wheel when the parts are as seenat Fig. 3, so that the line-space wheel and platen must rotate together. The outer jaw 11 and each clutch-bar may be shorter than the inner jaw 10, as shown, thus giving the jaws a powerfulgrip. The clutch members may be released by pressing the hand-wheel 8 to the left, since said hand-wheel is fixed upon the central rod 15 and is ca able ofniovingjthe bracket 14, with its rolls 13,- to the idle position seen at Fig. 2. When the parts are in this position, the platen may be'turned to The hand-wheel 8 may still be employed for about the rod 15 and is carried in a cylindrical housing 23. One end of the spring bears against the bottom 24; of the housing, while the other end bears against a collar 25, fixed upon the rod 15; The'bars 12 have canes 26, which are engaged by the rolls 13 during the return or outward movement of the rod 15, thereby forcing the clutch-bars apart, the spring 22 having suflicient strength for this purpose. The flange 9 of the linespace wheel has a turning fit upon a boss 27, formed upon the platen head 17, Fig. 13.

. Preferably concentric with the platen and alongside of the line-space wheel is a stopwheel 28, which is normally silent or motionless during the rotation of the platen and is brought into use only when it is desired to ro-' tate the platen backward and forward for considerable distance and to arrest the platen at a predetermined point in its rotation in each direction. For this purpose the wheel earries suitable stops, which will presently be described. it is provided with a clutch n1ech anisin corresponding generally to that which has already been described in connection with the line-space wheel. Said clutch mechanism comprises a pair of clutcl1b ars 29,liav:- ing jaws 30 and 31. These bars are fitted in opposite radial slots 32, formed in the platenhead 17 at right angles to the slots 16. It will'also be seen that a cap 33 is secured by screws 34 to the platen-head 17 for retaining the clutch-bars 12. Said cap 33 is formed with opposite radial slots 35, coincident with the slots 32 in-the-platen-head. The jaws 3O 31 engage an interior flange 36,forrned upon the stop-wheel 28 and having a turning it upon a boss 37, formed exteriorly upon the cap 33. The clutch-bars 29 always turn with the platen, but are normally silent, so that the stop wheel does not turn, Figs. 5 and 8.

When, however, the hand-wheel 8 is pressed in beyond the Fig. 2 position, a pair of cams 38, formed upon the bars 29, are engaged by rolls 39, carried upon a bracket 40, fixed to the central rod 15, whereby the bars 29 are canirned apart, causing the jaws 30.31 to bite the flange 36 of -the stop-wheel, so that the latter is forced to rotatewith the platen, Figs. 4 and 7 The stop-wheel is retained by a cap 41, which is secured to the platen-head 17 by means ofthe screws 34, the latter passing through both caps and threaded into said platen-head, Fig; 13, and while the stop is active the. line-space wheel 3 is silent, its clutch-bar 12 being released, as seen at Fig. 3;

Thus it will be seen that normally the handwheel 8 may be used for turning" the platen and line-space wheel 3 in the usualmanner, while the stop-wheel 28 remains silent, and that bypressing said hand-wheel to the left for a short distance the platen may be turned independently of both line-space wheel and stop-wheel, while When the hand-wheel is pressed to the left as far as it will go the platen and stop-wheel 28 are locked together,

so that the platen when turned backward and forward may be arrested by the stops on said wheel and that at all times the platen may be rotated by said hand-wheel 8. Upon releasing the hand-wheel the platen becomes auto- -matically reconnected to the'line-space wheel to other forms of mechanism of this characas a screw 47. Each ter. I preferably provide/upon the, platenframe a yielding detent or stop comprising a spring-arm 42, can ing a roll 43, adapted to fit in a V-not'ch44, ormed in eachof a pair of stops 46,fitted upon the periphery of the stop-wheel 28 and each adjustable around said wheel and secured by any suitable means, stop has a'sloping or cam surface 48,- over which the'wheel 43 will ride during the rotation of the wheel, the spring 42 being sufiiciently yielding for this purpose; but each stop also includes an abrupt surface or abutment-49, which positively arrests the platen, or at least ofiers -tr'ated, whereas the .upon the outer side a sleeve 51, having such resistance that it will not be overcome by the usual rotative pressure applied to the p aten by the operator, so that for practical purposes the platen is brought to rest when rotating backward and forward by the abrupt faces or teeth'49. It will be understood that the engagement of the yielding detent 43 with the notches 44 prevents accidental rotation of the platen, while the platen may be easily'turned in one direction to force the detent out of the notches. Each stop '45 and 46' is forked to fit overthe periphery of the stop-Wheel, so that turning the screw 47 may clamp the stop to the wheel.

The peri hery of the stop-Wheel is preferably provi ed with a scale 50, whereby to set the stops, and this scale may, if'desired, be graduated in sixteenths of aninch, as illusfirst line of writing may be brought accurately to any desiredpoirit on the page. 1 a

. It will be seen at Fig. 9 that the housing 23 is rigidly secured to the platen-head 17 aiid at Fig. 3 that it has a. longitudinal slot 21, in which the double spline 20-plays. Fixed of the platen-head is. a reduced portion or gudgeon 52, which turns in a bearing 53, Fig. 5, formed in the platen-frame 2. The central rod 15 passes through the sleeve 51. The hand-wheel 7 is secured upon a stem 54, which serves as abearing or axle for the other end of the platen.

Variations may be resorted to within the scope of the invention, and portions of the improvement maybe used without others.

Havingfthus described my invention, I claim 1.111 a type-writing machine, the combination with a revoluble platen and a line-space wheel therefor, and a detent for said linespace ,wheel, of means for releasing the platen from the control of said detent, and a stop ad justable to predetermine the extent to which the platen can be rotated when so released; said stop normally ineffective to arrest the platen, but connected to said releasing means to be rendered effective thereby.

2. In a type-Writing machine, the combination With a revoluble platen and a line-space Wheel therefor, and a detent for said linespace wheel, of means for releasing the platen from the control of said detent, and stops for limiting the forward "and backward movements of the platen when so. released; said stops normally ineifective to arrest the platen, but connected to said reieasing means to-be rendered effective thereby.

3. Ina type-writing machine, the combination with a revoluble laten and a line-space wheel, of means for re easing the platen from the line-s ace wheel and stops for limitin P i :2

.the backward and forward strokes of the.

platen when so released; said stops normally lnefiective to arrest the platen, but connected to said releasing means to be rendered effective thereby.

4. In atype-miting machine, the combination with a revoluble platen and a line-space wheel, of a stop-carrying member which is normally stationary during the revolution of the platen, and means fordisconnecting theplaten from the line-space wheel and connecting it .to said stop-carr ing member so that the latter rotates with t e platen, and a fixed stop to. cooperate with said stop-carrying member.

5. In a typ platen, of astop-carrying member normally. disconnected from said platen, a line-space Wheel for the platen, a de'tent for said line-space Wheel, and means forconnecting the stop-carrying member to the platen control of said detent.

6. In a type-Writing machine, the combina tion'with a revoluble platen, of a stop-carrying member normally stationary during the rotation of the platen, a line-space wheel and detent'for the platen, a finger-piece, a clutch operable by said'finger-piece for connectin said stop-carrying member to the platen and eewritingnmachine, the combina-' .t1on with a revoluble and releasing the platen from the means also controlled by said finger-piece for releasing the, platen from the control of said line-space wheel and detent.

7. In a type-writing machine, the combination with a revoluble platen, of a wheel rotatable with the platen, stops upon said wheel and relatively adjustable around the wheel, and a yielding detent to engage said stops.

8. In a type-writing machine, the combination with a revoluble platen, of a wheel rotatable with the platen, stops upon said wheel and relatively adjustable around the wheel, and a yielding detent to engage said stops, said stop-carrying member being normally stationary during the rotation of the platen,

and means being provided for connecting the platen to said stop-carrying member, at will.

9; In a type-writing machine, the combination with a revoluble platen, of a wheel rotatable with the platen, stops upon said wheel and relatively adjustable around the wheel, and a yielding detent to engage said stops, said stop-carrying member being normally stationary during the rotation of the platen, and means being provided for connecting the platen to said stop-carrying member, at will, said relatively adjustable stops having inclined teeth to enable them to overcome the restraint of said detent when force is supplied to the wheel to rotate the same.

10. In a type-writing machine, the combi nation with a platen and a line-space wheel, of a stop-carrying wheel, a clutch to connect the platen to the line-space wheel, a second clutch to connect the platen to the stop-carrying wheel, and a single finger-piece having means to control both of said clutches.

, 11. In a type-writing machine, the combination with a revoluble platen, a line-space wheel and a stop-carrying wheel, of means for either connecting the platen in alternation to the line-spaoe wheel, and stop-carryingwheel,

or releasing said platen from both wheels, at

will.

12. In a type-writing machine, the combination with a revoluble platen, of a plurality of yielding detents, Wheels controlled by said -detents for governing the line-s ace move ments of the platen and means or bringing either detent and wheel into action and simultaneously silencing the other wheel and detent.

13. In a type-writing machine, the combination with a revoluble platen, of a plurality of independently-operable wheels having means for governing the line-space'move-' ing wheel,,and a single finger-piece having means to control both of said clutches; the

construction and arrangement being such that both clutches-may be out of use simultaneously, so as to permit the revolution of the platen independently of both wheels.

15. In a type-writing machine,'the combi nation with a revoluble platen, of a wheel normally disconnected from the platen, relatively adjustable stop-teeth mounted upon said Wheel, a yielding detent to engage said stop-teeth,thelatterbeing inclined so as to be capable of forcing said detent aside, and means for connecting said wheel to the platen, at will.

16. In a type-writin machine, the combination with a revoluble platen, of a wheel normally disconnected from the platen, relatively'adjustable stop-teeth mounted upon said wheel, a yielding detent to engage said stop-teeth, the latter being inclined so as to be capable of forcing said detent aside, and means for connecting said wheel to the platen, at will; said detent being constructed to cooperate with each of said stops to restrain the platen against rotation in either direction be capable of forcing said detent aside, and

means for connecting said wheel to the platen, at will; said detent being constructed to cooperate with each of said stops to restrain the platen against rotation in either CllIQC- tion; one of said stops having an abru t abutment to prevent further rotation of t 'e platen in backward direction, and the other of said stops having an abrupt abutment to revent further rotation of said platen in 'orward direction.

18. In a type-writing machine, the combi' laten having a head, and a nation with a line-space whee having a flange, of a pair of clutch members, supported in said head and comprising bars extending within the platen, and jaws to grip said flange, a rod carrying a hand-wheel and passing axially within the platen, a spring holding said rod in normal position, means carried by said rod and normally pressing said bars'so as to cause the jaws to bite the flange; a stop-carrying wheel having a flange, a second pair of clutch members also supported in said head and comprising bars extending within the platen, and having jaws to grip the lastmentioned flange, and means also carried by said rod, and normally out of action, for pressing the last-mentioned bars, so as to cause their jaws to bite the flange oi the stop-carrying wheel.

19. In a type-writing machine, the combis I eachofsaldw ond pair of clutch-bars a so supported in said head and extemling through said cap, and having jaws .to grip the last-mentioned flange are formed opposite radial slots, of a linespace wheel having an interior flange, a pair' 0 bars fitted iI1.S&id.j SlOlI-Sf&11d extending within the platen and having at their outer ends each a pair of jaws. to bite said flange,

the inner j awbeing longer than the outer j aw, and said b'ars having cams provided upon their inner'end, a rod passing through said head, a tubular su port extending inwardly from said head an guiding said rod, a spring surrounding said rod within said .tube, for holding said rod in normal endwise position, rolls on opposite sides of said rod to engage said cams upon said bars, and normally separating the bars, and thereby causingthe jaws to bite the flange, and a hollow journal projecting outwardly from said head; said rod extending outwardly from said hollow journal, and provided with a finger-Wheel; said head having a projecting circular bearing upon which said flange has a turning fit, and said slots extending through said bearing, a

cap upon said-head for retaining the line-- s ace wheel, a'stop-carrying wheel having a ange and also turning u on said. head, a secmeans also carried by said-rodandnorma out of action, for pressing the last-mentioned clutching bars so as to cause their jaws to bite the last-mentionedflaflge, a ca secured upon said stop-carryingwheel, a p aten-frame in which said journal has a bearing, and yielding detents'upon said pla-ten frame one for eels."

l 20. In a type-writing machine, the combination with a platen, of a finger-wheel normally capableofrotating the platen, a. line space wheel-and detent, means forenabling the finger-wheel to release the platen from said line-s ace wheel and detent, and'means' connectib e to the platen by said hand-wheel for adjustably limiting the forward and backward rotations of the platen.

-\21. In a type-writingmachine, the combination with a linespa ce wheel having adetent, of a platen, means for causing the platen either to rotate together-with the line space wheel or to rotatein either forward or backward direction independently. of the line-space wheel while the latter is stationary, and sto s for limiting both the backward and forwar rotations of the laten which are effected independently 0 said line-space wheel.

' tions.

. 22. Ina type-writing machine, the combi-' nation with a line-space Wheel having a detent, of a platen, a finger-piece, means controlled by said finger-piece for causing the platen either to rotate'together with the linespace wheel or to rotate in either forwardor backward direction inde endently of the line- 'space wheel while the atter is stationary,

and relatively'adjustable stopsfor limiting both the backward and forward rotations' of the laten effected by saidfinger-piece indepe'n ently of said line-spacewheel. I

23. In a-type-writing machine having a revoluble platen and a linespace wheel therefor, the combinationof a detent for said line-space wheel, a normally ineffective stop, and 'a finger-piece having means to release the platen from the ,control'of, said detent" and concomitantly render said stop effective to predetermine the extent to which the "platen can be rotated.

24. In a' type-writing machine having a revohible platen and a line-space wheel theree a finger-piece having means to release the platen from the, control of said line space wheeLand concomitantly render said stops effective to predetermine the extent to which the platen can be rotated in backward and forward directions.

26'. In a type-writing machine having a revoluble platen and a line-space wheel therefor, the combination of adetent for said linespace wheel, relatively adjustable but normally inefiective stops, and a finger-"piece having means to'release the platen from the control of said line space wheel and concomitantly render said stops efiective to predetermine the extent to which the platen can be rotated in backward and forward direc- *ALLIN W. HEWITT.

Witnesses:

' B. O. STIOKNEY,

'Krr'rm FRANKFORT. 

